Annual report pursuant to Section 13 and 15(d)

Organization (Details)

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Organization (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Sep. 30, 2008
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Income Tax Benefit Understated [Member]
Dec. 31, 2010
Additional Paid-In Capital And Accumulated Deficit Overstated [Member]
Dec. 31, 2009
Additional Paid-In Capital And Accumulated Deficit Overstated [Member]
Dec. 31, 2008
Additional Paid-In Capital And Accumulated Deficit Overstated [Member]
Dec. 31, 2008
HSN [Member]
Dec. 31, 2008
HSN [Member]
Net Loss Restated [Member]
Dec. 31, 2008
HSN [Member]
Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]                                      
Quantifying Misstatement in Current Year Financial Statements, Amount                 $ 263,500,000       $ 263,500,000 $ 263,500,000 $ 263,500,000 $ 263,500,000      
Net loss $ (46,518,000) [1],[2] $ (24,304,000) $ (31,967,000) $ (20,281,000) $ (41,287,000) [1],[2] $ (14,878,000) $ (24,706,000) $ (17,653,000)   $ (123,070,000) $ (98,523,000) $ (72,488,000)           $ 2,130,000,000 $ 2,400,000,000
Net loss per basic and diluted share                                 $ (37.85)   $ (42.54)
[1] Cornerstone has a 4-4-5 week accounting cycle with the fiscal year ending on the Saturday on or immediately preceding December 31. The fourth quarter of 2011 included an extra week compared to the other quarters in 2011 and 2010.
[2] The fourth quarter of 2011 includes $3.0 million of asset impairment charges, and a related $1.1 million tax benefit, related to indefinite-lived intangible assets and long-lived assets of one of the Cornerstone brands. These charges decreased diluted earnings per share by $0.03.